摘要:
Inorganic and organic compounds containing fluorine can be produced, for example, from corresponding chlorine-containing compounds by chlorine/fluorine exchange using fluorinating agents. Monocyclic or bicyclic compounds containing at least two nitrogen atoms, at least one of which is incorporated into the ring system, can be used as catalysts or fluorinating agents for chlorine/fluorine exchange reactions to produce sulfurylchlorofluoride, sulfurylfluoride or a carboxylic acid fluoride. It is likewise possible to carry out HF addition to unsaturated carbon-carbon bonds or chlorine/fluorine exchange at carbon atoms. For example, monochloro or dichloro malonic acid esters can be converted to difluoro malonic acid esters. Work-up of the reaction mixture can be simplified by using suitable solvents which force the reaction mixture to exist in two phases.
摘要:
The present invention provides a process for selectively separating HF and like acids present along with water-unstable organic acid fluorides. In particular, the invention provides a process for separating an acid from a system in which the acid and an organic acid fluoride are present, the organic acid fluoride being represented by formula (I): RCOFnullnull(I) wherein R is a fluorine atom; a C1-20 linear, branched or cyclic alkyl or halogenated alkyl group that may contain a heteroatom; or a C6-20 aryl or halogenated aryl group that may contain a heteroatom; the process comprising using as a deacidifying agent an aromatic heterocyclic compound having a boiling point of at least 50null C. and having one or more nitrogen atoms as heteroatom.
摘要:
The present invention provides novel processes for preparing a fluorinated acyl fluoride and a fluorinated vinyl ether. Namely, it provides a process for preparing a fluorinated acyl fluoride (3), which comprises reacting a compound (1) having a fluorine content of 30 mass % or above with fluorine in a liquid phase to form a compound (2) and then dissociating the ester bond in the compound (2), and a process for preparing a fluorinated vinyl ether (10), which comprises pyrolyzing the fluorinated acyl fluoride: 1 wherein RA and RB are alkyl groups or the like, or the combination RA and RB is an ethereal oxygen-containing alkylene group or the like, RC and RD are perfluoro(ethereal oxygen-containing alkyl) groups or the like, or the combination of RC and RD is a perfluoro(ethereal oxygen-containing alkylene) group or the like, X1, X2 X3, X4, X5 and X6 are hydrogen atoms, fluorine atoms or the like, RAF, RBF, RCF and RDF are groups derived respectively from RA, RB, RC and RD by replacing substantially all of the hydrogen atoms by fluorine atoms.
摘要翻译:本发明提供了制备氟化酰氟和氟化乙烯基醚的新方法。 即,提供一种制备氟化酰基氟(3)的方法,其包括使氟含量为30质量%以上的化合物(1)与氟在液相中反应以形成化合物(2),然后解离 化合物(2)中的酯键和制备氟化乙烯基醚(10)的方法,其包括热解氟化酰基氟化物:其中R A和R B是烷基等,或 R A和R B的组合是含醚的亚烷基等,R C和R D均为全氟(醚性含氧烷基)基团等,或者R C 1和R D是全氟(醚性含氧亚烷基)基团等,X 1,X 2 X 3,X 4,X 5和X 6 >是氢原子,氟原子等,R“,R”,R“CF”和“R”是分别衍生自R a,R B,R C和 通过用氟原子代替基本上所有的氢原子。
摘要:
A nitrous acid salt is added at a temperature of 10 to 80null C. to an aqueous solution which contains an optically active 2-aminocarboxylic acid (4) and a protonic acid, the amount of the latter acid being 1 to 3 equivalents to the former, and which has a proton concentration of 0.5 to 2 mol/kg to conduct a reaction to thereby produce an optically active 2-hydroxycarboxylic acid (1). Thionyl chloride and a basic compound are caused to act on the compound (1) to chlorinate it and simultaneously invert the configuration in the 2-position. Thus, an optically active 2-chlorocarboxylic acid chloride (5) is induced. The compound (5) is hydrolyzed to induce an optically active 2-chlorocarboxylic acid (2). The compound (2) is reacted with a thioacetic acid salt to incorporate an acetylthio group thereinto and simultaneously invert the configuration in the 2-position to thereby produce an optically active 2-acetylthiocarboxylic acid (3). 1
摘要:
A method is provided for reacting hexafluoropropylene oxide (HFPO) with a perfluoroacyl fluorides according to the formula XnullRfnullCOF (II) to selectively produce a monoaddition product according to the formula XnullRfnullCF2nullOnullCF(CF3)COF (I), wherein selectivity for the monoaddition product over the biaddition product is 90% or greater or more typically 95% or greater. A continuous or repeated-batch process is provided comprising the steps of: a) providing a mixture of XnullRfnullCOF (II), a fluoride salt, and a polar solvent; b) adding hexafluoropropylene oxide (HFPO) in an amount such that XnullRfnullCOF remains in molar excess of HFPO by at least 10% and reacting XnullRfnullCOF with HFPO; c) separating unreacted XnullRfnullCOF from a mixture of addition products of hexafluoropropylene oxide (HFPO) and XnullRfnullCOF; and d) repeating step a) using unreacted XnullRfnullCOF separated in step c).
摘要:
Hydrofluoroethers of formula:TnullCFXnullnullOnullRfnullCFXnullTnullnullnull(II)wherein: TnullCH3; X, Xnull, equal to or different from each other, are selected between F, CF3; T00nullnullF, Cl, H, C1-C3 perfluoroalkyl, CH3, CH2OH, COCl, CHO, CO2H; Rf is a perfluoroalkylene or a perfluoropolyoxyalkylene and respective preparation process by reduction with hydrogen in the presence of a platinum catalyst supported on metal fluorides of the corresponding compounds with at least one nullCOCl end group.
摘要:
3,5-Bis(trifluoromethyl)benzoyl chlorides optionally substituted with fluorine or chlorine are advantageously prepared by converting 3,5-dimethylbenzoic acids optionally substituted with fluorine or chlorine into the corresponding acid chlorides; completely free-radically chlorinating said chlorides in the side chains, giving 3,5-bis(trichloromethyl)benzoyl chlorides optionally substituted by fluorine or chlorine; fluorinating the latter with anhydrous hydrogen fluoride and/or antimony pentafluoride, giving 3,5-bis(trifluoromethyl)benzoyl fluorides optionally substituted with fluorine or chlorine; and then reacting the 3,5-bis(trifluoromethyl)benzoyl fluorides with silicon tetrachloride in the presence of a further Lewis acid. Some of the 3,5-bis(trihalogenomethyl) and 3,5-dimethylbenzoyl halides which arise as intermediates are novel compounds.